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Title: Phase-filed modelling and synchrotron validation of phase transformations in martensitic dual-phase steel

Abstract

A thermodynamically based method to describe the phase transformations during heating and cooling of martensitic dual-phase steel has been developed, and in situ synchrotron measurements of phase transformations have been undertaken to support the model experimentally. Nucleation routines are governed by a novel implementation of the classical nucleation theory in a general phase-field code. Physically-based expressions for the temperature-dependent interface mobility and the driving forces for transformation have also been constructed. Modelling of martensite was accomplished by assuming a carbon supersaturation of the body-centred-cubic ferrite lattice. The simulations predict kinetic aspects of the austenite formation during heating and ferrite formation upon cooling. Simulations of partial austenitising thermal cycles predicted peak and retained austenite percentages of 38.2% and 6.7%, respectively, while measurements yielded peak and retained austenite percentages of 31.0% and 7.2% ({+-}1%). Simulations of a complete austenitisation thermal cycle predicted the measured complete austenitisation and, upon cooling, a retained austenite percentage of 10.3% while 9.8% ({+-}1%) retained austenite was measured.

Authors:
; ; ; ;  [1]
  1. NIMR-Netherlands
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
USDOE
OSTI Identifier:
1007675
Resource Type:
Journal Article
Journal Name:
Acta Mater.
Additional Journal Information:
Journal Volume: 55; Journal Issue: (2) ; 01, 2007; Journal ID: ISSN 1359-6454
Country of Publication:
United States
Language:
ENGLISH
Subject:
36 MATERIALS SCIENCE; 43 PARTICLE ACCELERATORS; AUSTENITE; CARBON; FERRITE; HEATING; IMPLEMENTATION; KINETICS; MARTENSITE; NUCLEATION; PHASE TRANSFORMATIONS; STEELS; SUPERSATURATION; SYNCHROTRONS; TRANSFORMATIONS; VALIDATION

Citation Formats

Thiessen, R G, Sietsma, J, Palmer, T A, Elmer, J W, Richardson, I M, LLNL), and DUT). Phase-filed modelling and synchrotron validation of phase transformations in martensitic dual-phase steel. United States: N. p., 2008. Web. doi:10.1016/j.actamat.2006.08.053.
Thiessen, R G, Sietsma, J, Palmer, T A, Elmer, J W, Richardson, I M, LLNL), & DUT). Phase-filed modelling and synchrotron validation of phase transformations in martensitic dual-phase steel. United States. https://doi.org/10.1016/j.actamat.2006.08.053
Thiessen, R G, Sietsma, J, Palmer, T A, Elmer, J W, Richardson, I M, LLNL), and DUT). 2008. "Phase-filed modelling and synchrotron validation of phase transformations in martensitic dual-phase steel". United States. https://doi.org/10.1016/j.actamat.2006.08.053.
@article{osti_1007675,
title = {Phase-filed modelling and synchrotron validation of phase transformations in martensitic dual-phase steel},
author = {Thiessen, R G and Sietsma, J and Palmer, T A and Elmer, J W and Richardson, I M and LLNL) and DUT)},
abstractNote = {A thermodynamically based method to describe the phase transformations during heating and cooling of martensitic dual-phase steel has been developed, and in situ synchrotron measurements of phase transformations have been undertaken to support the model experimentally. Nucleation routines are governed by a novel implementation of the classical nucleation theory in a general phase-field code. Physically-based expressions for the temperature-dependent interface mobility and the driving forces for transformation have also been constructed. Modelling of martensite was accomplished by assuming a carbon supersaturation of the body-centred-cubic ferrite lattice. The simulations predict kinetic aspects of the austenite formation during heating and ferrite formation upon cooling. Simulations of partial austenitising thermal cycles predicted peak and retained austenite percentages of 38.2% and 6.7%, respectively, while measurements yielded peak and retained austenite percentages of 31.0% and 7.2% ({+-}1%). Simulations of a complete austenitisation thermal cycle predicted the measured complete austenitisation and, upon cooling, a retained austenite percentage of 10.3% while 9.8% ({+-}1%) retained austenite was measured.},
doi = {10.1016/j.actamat.2006.08.053},
url = {https://www.osti.gov/biblio/1007675}, journal = {Acta Mater.},
issn = {1359-6454},
number = (2) ; 01, 2007,
volume = 55,
place = {United States},
year = {Wed Nov 12 00:00:00 EST 2008},
month = {Wed Nov 12 00:00:00 EST 2008}
}